diff options
author | Cindy H Kao <cindy.h.kao@intel.com> | 2009-08-27 15:25:12 -0700 |
---|---|---|
committer | Inaky Perez-Gonzalez <inaky@linux.intel.com> | 2009-10-19 15:55:33 +0900 |
commit | 5b45bfe5010ae1ddaac463d1bcdb141a4ff4ff66 (patch) | |
tree | 8115ce638a420e4ba6610ea6c2e126ddb9180b86 /net/wimax/op-rfkill.c | |
parent | 663ebb4aa2fd0d19e3d1da0fed3fa3fa134a4ef0 (diff) |
wimax/i2400m: fix the bootmode RX deadlock in SDIO driver
i2400ms_bus_bm_wait_for_ack() causes a race condition. It happens
because this function clears i2400ms->bm_ack_size before waiting for
an interrupt, which is set by the interrupt service routine i2400ms_rx()
to indicate reception and size of received data; thus, if the interrupt
came right before the clearing/waiting, it is lost.
The fix is clear the bm_ack_size to -EINPROGRESS before we are enabling
the RX interrupt configuration in i2400ms_rx_setup(). Then everytime
when the interrupt service routine i2400ms_rx() is invoked during bootmode,
bm_ack_size is updated with the actual rx_size and it is cleared to
-EINPROGRESS again after the RX data is handled.
Signed-off-by: Cindy H Kao <cindy.h.kao@intel.com>
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
Diffstat (limited to 'net/wimax/op-rfkill.c')
0 files changed, 0 insertions, 0 deletions